公开(公告)号：DE69626569T2

公开(公告)日：2004-02-12

申请号：DE69626569

申请日：1996-05-31

Applicant: IBM

Inventor： BAKKE BRIAN ERIC ,  MOERTL DANIEL FRANK ,  WALK BRUCE MARSHALL

IPC: G06F3/06 ,  G11B20/00

Abstract: A data compression method and compression data structure are provided for a direct access storage device (DASD). The DASD is segmented into a plurality of compression groups. Each of the compression groups has a fixed logical size. A directory table is written within each of the compression groups. Eachcompression group has at least one compressed data region on which compressed data can be written and an exception region on which compressed data exceptions can be written. The compressed data exceptions include updated compressed data which exceeds an original storage space for corresponding original compressed data.

公开(公告)号：DE69626569D1

公开(公告)日：2003-04-17

申请号：DE69626569

申请日：1996-05-31

Applicant: IBM

Inventor： BAKKE BRIAN ERIC ,  MOERTL DANIEL FRANK ,  WALK BRUCE MARSHALL

IPC: G06F3/06 ,  G11B20/00

Abstract: A data compression method and compression data structure are provided for a direct access storage device (DASD). The DASD is segmented into a plurality of compression groups. Each of the compression groups has a fixed logical size. A directory table is written within each of the compression groups. Eachcompression group has at least one compressed data region on which compressed data can be written and an exception region on which compressed data exceptions can be written. The compressed data exceptions include updated compressed data which exceeds an original storage space for corresponding original compressed data.